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Microchip Technology JANTXV1N4958CUS/TR
- Part No.:
- JANTXV1N4958CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4958CUS/TR.pdf
- Description:
- DIODE ZENER 10V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:5,801
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Product details
Overview
JANTXV1N4958CUS/TR from Microsemi is a military-grade, voidless-hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature. It provides precise 10.0 V nominal regulation with ±2% tolerance (C suffix), 2.0 Ω dynamic impedance at 125 mA test current, and operates across –65 °C to +175 °C junction temperature. It serves as a high-reliability voltage reference in radiation-hardened avionics power conditioning circuits.
For engineers reviewing the JANTXV1N4958CUS/TR datasheet, JANTXV1N4958CUS/TR pinout, JANTXV1N4958CUS/TR application, or JANTXV1N4958CUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, hermetic glass package, Category I metallurgical bond, 7 °C/W thermal resistance, and compatibility with high-temperature PCB assembly processes.
Technical Context
This device belongs to the 1N4954US–1N4996US family of surface-mount Zener regulators, designed for fail-safe voltage stabilization in mission-critical analog and power-supply feedback paths. Its voidless-glass construction ensures zero internal delamination under thermal cycling, while triple-layer passivation prevents moisture ingress and surface leakage.
The JANTXV1N4958CUS/TR uses an internal tungsten slug bonded via Category I metallurgy to copper end caps with Sn/Pb finish, enabling stable operation up to 175 °C junction temperature. Its 1.0 V maximum reverse leakage at 7.6 V and 25 °C supports low-power biasing in precision reference chains without compromising stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 10.0 V @ 125 mA - defines regulated output level for feedback networks in DC-DC converters |
| Zener Tolerance | ±2% (C suffix) - enables tighter output voltage control than standard ±5% parts |
| Dynamic Impedance | 2.0 Ω @ IZT = 125 mA - ensures minimal output voltage shift under load transients |
| Power Dissipation | 5 W @ TEC = 140 °C - supports high-current regulation without external heatsinking |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal path to PCB copper pour or metal-core substrate |
| Operating Temperature | –65 °C to +175 °C - qualified for aerospace, downhole, and defense electronics environments |
| Reverse Leakage | 1.0 μA @ VR = 7.6 V - maintains low quiescent current in high-impedance reference nodes |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs and copper end caps (E package / D-5B outline). Cathode indicated by band. No marking on body. Tape-and-reel packaging per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in shunt regulator configuration; accepts up to 1.5 V forward drop at 1 A |
| Cathode | Zener breakdown terminal | Connected to regulated output node; carries full Zener current during regulation; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal microvoids that cause parametric drift under thermal stress or radiation exposure |
| Category I metallurgical bond | Ensures mechanical integrity and thermal continuity between silicon die and tungsten slug over 1000+ thermal cycles |
| Triple-layer passivation | Provides immunity to humidity-induced surface conduction and ion migration in high-bias applications |
| Radiation hardness | Inherently tolerant to total ionizing dose (TID) per MicroNote 050 - suitable for space-grade systems |
| ESD robustness | Non-sensitive per MIL-STD-750 Method 1020 - survives >4 kV HBM without parameter shift |
Applications
| Aerospace Power Conditioning | Downhole Instrumentation |
|---|---|
|
Use Scenario: Regulating reference voltage for ADC biasing and sensor excitation in satellite power management units. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 10.0 V rail for precision analog front-ends. Use Value: ±2% tolerance and <2 Ω dynamic impedance maintain ADC accuracy across –55 °C to +125 °C operational range. |
Use Scenario: Stabilizing supply rails for MEMS pressure sensors deployed in oil/gas wellbores. IC Role / Device Role / Timing Role: Primary voltage clamp protecting downstream circuitry from transient overvoltage events. Use Value: 175 °C max junction temperature rating enables continuous operation in 150 °C ambient downhole environments. |
| Military Avionics Reference | Radiation-Hardened Systems |
|
Use Scenario: Generating stable bias for RF amplifier stages in airborne radar transceivers. IC Role / Device Role / Timing Role: Low-noise Zener reference in LNA bias network requiring minimal voltage drift. Use Value: 7 °C/W thermal resistance and hermetic seal prevent thermal runaway and parameter shift during rapid altitude changes. |
Use Scenario: Providing reference voltage in nuclear reactor monitoring electronics exposed to gamma radiation. IC Role / Device Role / Timing Role: Radiation-tolerant voltage reference maintaining regulation under 100 krad(Si) TID exposure. Use Value: Inherent radiation hardness eliminates need for shielding or derating, reducing system mass and volume. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4958US/TR | Same 10.0 V rating but ±5% tolerance (no C suffix); identical package, thermal, and reliability specs | Lacks tight tolerance needed for high-accuracy feedback loops; acceptable where cost sensitivity outweighs precision | Select when ±5% regulation suffices and budget constraints preclude premium tolerance grades |
| JANS1N4958CUS/TR | Same 10.0 V ±2% spec but qualified to JANS level (higher screening, extended testing per MIL-PRF-19500/356) | Required for Class S spaceflight applications; higher cost and longer lead time than JANTXV grade | Choose only when mission assurance requirements mandate JANS-level screening and traceability |
Compared with JANTXV1N4958CUS/TR, the JANTXV1N4958US/TR offers lower cost at reduced voltage accuracy, while the JANS1N4958CUS/TR adds stringent screening for space-qualified designs-neither is pin-compatible replacement without requalification.
Availability
JANTXV1N4958CUS/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, downhole instrumentation, and military avionics requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for JANTXV1N4958CUS/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and military-grade analog and discrete components.
The JANTXV1N4958CUS/TR belongs to Microsemi's legacy 1N49xxUS Zener series, engineered specifically for high-temperature, high-reliability voltage regulation in defense, aerospace, and energy exploration systems.
FAQ
What is the Zener voltage tolerance of JANTXV1N4958CUS/TR?
The JANTXV1N4958CUS/TR has a nominal Zener voltage of 10.0 V with a tolerance of ±2%, indicated by the "C" suffix in the part number. This tighter tolerance is achieved through post-trim screening and is verified per MIL-PRF-19500/356 test requirements. The JANTXV1N4958CUS/TR maintains this specification across its full operating temperature range of –65 °C to +175 °C.
Does JANTXV1N4958CUS/TR require heatsinking in 5 W operation?
The JANTXV1N4958CUS/TR is rated for 5 W dissipation at 140 °C end-cap temperature with a thermal resistance of 7 °C/W junction-to-end-cap. When mounted on a standard FR-4 PCB with adequate copper area, it can dissipate full 5 W without external heatsinking. However, sustained operation above 140 °C end-cap temperature requires linear derating to zero at 175 °C, so thermal design must ensure end-cap temperature remains within spec.
Is JANTXV1N4958CUS/TR compatible with lead-free reflow processes?
The JANTXV1N4958CUS/TR features copper end caps with Sn/Pb finish, making it incompatible with standard lead-free reflow profiles (which exceed 217 °C). Its maximum soldering temperature is limited to 230 °C for 10 seconds per MIL-STD-202 Method 210. For lead-free assembly, Microsemi recommends evaluating alternative qualified parts or using selective Pb-based soldering for this device.
What does the "JANTXV" prefix indicate for JANTXV1N4958CUS/TR?
The "JANTXV" prefix on JANTXV1N4958CUS/TR denotes compliance with the highest commercial-off-the-shelf (COTS) military screening level under MIL-PRF-19500/356, including extended temperature testing, burn-in, and lot acceptance testing. It signifies enhanced reliability over JAN and JANTX grades, with verification of performance at both –65 °C and +175 °C extremes.
How is polarity identified on JANTXV1N4958CUS/TR?
Polarity on the JANTXV1N4958CUS/TR is indicated by a visible cathode band on the glass body. The banded end is the cathode terminal, which connects to the regulated output node in shunt regulator configurations. The unmarked end is the anode. No part marking appears on the device body per specification, and orientation must be confirmed visually before placement.
JANTXV1N4958CUS/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 7.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/356
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
JANTXV1N4958CUS/TR FAQ
1.How can I place an order for JANTXV1N4958CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4958CUS/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for JANTXV1N4958CUS/TR reliable?
The price and inventory of JANTXV1N4958CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4958CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4958CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4958CUS/TR transactions.
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4.How is shipping managed for JANTXV1N4958CUS/TR?
JANTXV1N4958CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4958CUS/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for JANTXV1N4958CUS/TR?
For technical support, including JANTXV1N4958CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4958CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4958CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4958CUS/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that JANTXV1N4958CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4958CUS/TR?
All JANTXV1N4958CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4958CUS/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The JANTXV1N4958CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4958CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4958CUS/TR Tags
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